{ "schema_version": 1, "date": "2026-10-27", "base_commit": "308fec1162e77134d15206b819dd59e898ed910b", "selected_policy": "Compact scalar arithmetic, ordinary fast field arithmetic, reviewed GPS parser, shared CLI reply-copy compiler policy. RAK3401/RAK4631 repeater roles only.", "scope": "RAK3401 physical RAM-resident algorithm timing and production Full/Reduced build checks for both RAKs. 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"ratio": 7.187789431258617 } }, "scalar_only_comparison": { "keypair": { "added_ms": -0.3680625000000006 }, "sign_empty": { "added_ms": 0.015156249999996874 }, "sign96": { "added_ms": 0.015156249999996874 }, "sign256": { "added_ms": 0.015156249999996874 }, "shared_secret": { "added_ms": -0.19601562500000114 } } }, "hardware_method": { "clock_hz": 64000000, "code_and_constants": "SRAM", "interrupts": "masked", "per_operation_samples": 18, "vectors": 2, "warmups_per_vector_and_operation": 1, "watchdog": "fed before each operation, outside the timed region; 60 second configured timeout", "counter": "Cortex-M4 DWT CYCCNT", "overhead": "20 cycles, included in the displayed timings", "normal_application_flash_changed": false, "bootloader_changed": false, "existing_application_and_gateway_services_restored": true }, "benchmark_sources": { "tools/hil/nrf52_crypto_benchmark.c": "64f4d2f4d189e9d4b01a64b33f1f2d461a86bc7c276f4a514459325c7a022a23", "tools/hil/nrf52_crypto_benchmark.ld": "c12f3aaabad0a81c788c5eb869d09e5ecd5de5b2982af5c034daf2140b688f17" }, "compiler": "arm-none-eabi-gcc 14.2.1", "benchmark_flags": [ "-std=c99", "-Os", "-flto", "-mcpu=cortex-m4", "-mthumb", "-mfloat-abi=hard", "-mfpu=fpv4-sp-d16", "-ffunction-sections", "-fdata-sections", "-fno-strict-aliasing", "-DED25519_NO_SEED=1", "-DED25519_COMPACT_BASE=1", "-DED25519_COMPACT_SHA512=1" ], "benchmark_modes": { "baseline": { "BENCH_COMPACT": 0, "ED25519_COMPACT_SCALAR": 0, "ED25519_COMPACT_FIELD": 0 }, "compact": { "BENCH_COMPACT": 1, "ED25519_COMPACT_SCALAR": 1, "ED25519_COMPACT_FIELD": 1 }, "scalar_only": { "BENCH_COMPACT": 2, "ED25519_COMPACT_SCALAR": 2, "ED25519_COMPACT_FIELD": 0, "note": "Scalar flag 2 is true in the same preprocessor gate as the selected production value 1." } }, "rejected_field_candidate": { "reason": "Adds about 251 ms to signing and 236 ms to shared-secret calculation; synchronous radio servicing can be delayed.", "production_flash_images": { "3401": { "reduced_before": { 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"instructions": 1645602 }, { "operation": "shared_secret", "vector": 2, "stack_bytes": 768, "instructions": 1289673 } ], "scope": "Actual linked ARM crypto frames/instruction counts only; excludes caller/ISR stacks and physical timing." }, "4631": { "passed": true, "elf_sha256": "23fae794233d6df9d2c44cf490dba5ee1b4454f49d614a8291fd92e10e04eab1", "instruction_meter": "native", "measurements": [ { "operation": "sign", "vector": 1, "message_bytes": 0, "stack_bytes": 3512, "instructions": 1678474 }, { "operation": "sign", "vector": 1, "message_bytes": 96, "stack_bytes": 3512, "instructions": 1706221 }, { "operation": "sign", "vector": 1, "message_bytes": 256, "stack_bytes": 3512, "instructions": 1733968 }, { "operation": "keypair", "vector": 1, "stack_bytes": 2808, "instructions": 1645602 }, { "operation": "shared_secret", "vector": 1, "stack_bytes": 768, "instructions": 1290321 }, { "operation": "sign", "vector": 2, "message_bytes": 1, "stack_bytes": 3512, "instructions": 1678524 }, { "operation": "sign", "vector": 2, "message_bytes": 96, "stack_bytes": 3512, "instructions": 1706221 }, { "operation": "sign", "vector": 2, "message_bytes": 256, "stack_bytes": 3512, "instructions": 1733968 }, { "operation": "keypair", "vector": 2, "stack_bytes": 2808, "instructions": 1645602 }, { "operation": "shared_secret", "vector": 2, "stack_bytes": 768, "instructions": 1289673 } ], "scope": "Actual linked ARM crypto frames/instruction counts only; excludes caller/ISR stacks and physical timing." } }, "linked_arm_baseline_4631": { "passed": true, "elf_sha256": "2beff2f916231421287e0a774b6289df365336bfaa0d325a1521985b9001a18b", "instruction_meter": "native", "measurements": [ { "operation": "sign", "vector": 1, "message_bytes": 0, "stack_bytes": 3312, "instructions": 1666244 }, { "operation": "sign", "vector": 1, "message_bytes": 96, "stack_bytes": 3312, "instructions": 1693991 }, { "operation": "sign", "vector": 1, "message_bytes": 256, "stack_bytes": 3312, "instructions": 1721738 }, { "operation": "keypair", "vector": 1, "stack_bytes": 2808, "instructions": 1645602 }, { "operation": "shared_secret", "vector": 1, "stack_bytes": 768, "instructions": 1290329 }, { "operation": "sign", "vector": 2, "message_bytes": 1, "stack_bytes": 3312, "instructions": 1666294 }, { "operation": "sign", "vector": 2, "message_bytes": 96, "stack_bytes": 3312, "instructions": 1693991 }, { "operation": "sign", "vector": 2, "message_bytes": 256, "stack_bytes": 3312, "instructions": 1721738 }, { "operation": "keypair", "vector": 2, "stack_bytes": 2808, "instructions": 1645602 }, { "operation": "shared_secret", "vector": 2, "stack_bytes": 768, "instructions": 1289681 } ], "scope": "Actual linked ARM crypto frames/instruction counts only; excludes caller/ISR stacks and physical timing." } }